摘要:
180° coupler comprising: a power splitter (170) for splitting the input signal (160a) of the 180° coupler into two in phase signals of equal power; a first device (180a, 190a) for phase shifting one of the two output signals from the power splitter and a second device (180b, 190b) for phase shifting the other of the two output signals from the power splitter and whereby the total phase difference between the one output signal (160b) and the other output signal (160c) is 180°.
摘要:
Dispositif pour mélanger un signal d'entrée (I RF ) à une première fréquence (RF) avec un signal d'entrée (I LO ) provenant d'un oscillateur local à une seconde fréquence (LO), et pour fournir un signal de sortie (O IF ) à une fréquence intermédiaire (IF), avec réjection des harmoniques de la seconde fréquence (LO) jusqu'à un ordre très élevé par exemple supérieur à 10, ce circuit comprenant :
un mélangeur en anneau (17) à transistors à effet de champ (12,13,14,15) doublement équilibré, ayant une première et une seconde paires de bornes d'entrées (3,4;1,2) et ayant une paire de bornes de sorties (5,6), un premier et un second coupleurs (18,19) respectivement séparateur et combineur de phase, pour ledit signal d'entrée (I RF ) à la première fréquence (RF) et le signal de sortie (O IF ) à la fréquence intermédiaire (IF), connectées respectivement à la première paire de bornes d'entrée (3,4) et à la paire de bornes de sortie (5,6) du mélangeur en anneau (17), et constituées chacun respectivement d'un premier et d'un second sous-circuits (300,400;500,600) déphaseurs passifs identiques formés d'éléments localisés, et montés symétriquement, de manière que les impédances respectives sur les bornes de la première paire d'entrée et les bornes de la paire de sortie du mélangeur sont identiques. Appareil convertisseur ou appareil émetteur et/ou récepteur incluant un tel dispositif. Application : Industrie des cicuits MMICs pour télécommunication
摘要:
Elektrische Anlage, insbesondere Transformator, Phasenschieber oder Drossel, mit einem fluidgefüllten Kessel (2), der Seitenwände (3) aufweist, wobei zum Schutz vor Beschuss- und/oder Splittereinwirkung - die Seitenwände (3) durchschusshemmend aus einem Werkstoff, der eine Zugefestigkeit R m aufweist, die größer als 1000 MPa ist, gebildet sind, oder - eine durchschusshemmende Armierung (4) aus einem solchen Werkstoff vorgesehen ist, die außenseitig die Seitenwände (3) umhüllt.
摘要:
The invention relates to an electrical installation, in particular a transformer, phase shifter or inductor, comprising a fluid-filled tank (2) having side walls (3), wherein, for protection against bombardment and/or fragmentation effect, the side walls (3) are designed in a bullet-resistant manner and made of a material having a traction strength R m of greater than 1000 MPa, or wherein a bullet-resistant reinforcement (4) made of such a material is provided, the outer side of which is enveloping the side walls (3).
摘要:
A phase shift circuit and a phase shifter are achieved which are small in size and wide in bandwidth. The phase shift circuit includes a capacitor, and a series circuit composed of a switching element which exhibits capacitivity when it is in an off-state and an inductor connected in series with this switching element, the series circuit being connected in parallel with the capacitor. The capacitor and one terminal of the series circuit are connected with a high frequency signal input/output terminal, and the other terminal thereof is connected with ground.
摘要:
A duplexer (1) with two band-pass filters (5, 6) comprising film bulk acoustic wave resonators (FBAR) (8, 9, 10, 11, 12, 13) has an extra antiresonant circuit in order to block the transmission signal. It has an extra resonant circuit in order to allow the desired receive signal to pass. The antiresonant circuit comprises the first FBAR (11) and a parallel inductor (14). The resonant circuit comprises the first FBAR (11) and a series inductor (7).
摘要:
A small-sized, wideband phase shifting circuit and phase shifter comprising a capacitor; a switching element exhibiting a capacitance during OFF state; and a series circuit constituted by an inductor series connected to the switching element, the series circuit being connected in parallel with the capacitor; wherein an end of the capacitor and an end of the series circuit are connected to an input/output terminal of high frequency signals, while the other ends are connected to the ground.
摘要:
A high-frequency heating device including: a solid-state oscillator that generates a microwave; an amplifier that amplifies the microwave generated by the solid-state oscillator; an isolator that is connected to a stage subsequent to the amplifier, and blocks a reflected wave directed from an object exposed with the microwave; an antenna that irradiates the microwave toward the object; and a metal cavity that traps therein the microwave irradiated to the object.
摘要:
A duplexer (1) with two band-pass filters (5, 6) comprising film bulk acoustic wave resonators (FBAR) (8, 9, 10, 11, 12, 13) has an extra antiresonant circuit in order to block the transmission signal. It has an extra resonant circuit in order to allow the desired receive signal to pass. The antiresonant circuit comprises the first FBAR (11) and a parallel inductor (14). The resonant circuit comprises the first FBAR (11) and a series inductor (7).
摘要:
A method and apparatus for imparting a positive phase slope (i.e., a negative group delay) to a narrowband signals is disclosed which adjuststhe phases of the various frequency components of a signal in a manner opposite to that of a delay line. The invention also permits the amount of phase slope to be adjusted, electronically, without the need for electro-mechanical apparatus or the interchange of cables. Furthermore, embodiments of the present invention are advantageous in that at the center of the operating band they maintain the phase of the delayed signal. These results are obtained in an illustrative embodiment of the present invention which divides the signal to be delayed into two signals which traverse different signal paths (715, 719) and are recombined in a signal combiner (729). The first signal path advantageously comprises a gain control block (717). The second signal path advantageously comprises a second gain control block (725) and a fixed line delay (719) which is not found in the first signal path. The amount of phase slope imparted to the signal can be adjusted by varying the gain (or attenuation) of the respective gain control blocks (717, 725).